<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript" src="js/jquery-3.6.3.js"></script>
		<script>
				
			$(document).ready(function(){
				$("div").children(".p1").css("background-color","aliceblue");
			})
		</script>
		<style>
				
			div{
				background-color: red;
				width: 800px;
				height: 600px;
			}
				
			p{
				background-color: greenyellow;
				height: 50px;
			}
		</style>
	</head>
	<body>
		<div>
			<p></p>
			<p class="p1"></p>
			<p></p>
			<p></p>
			<p></p>
			<p></p>
		</div>
	</body>
</html>